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Hitotsu Futatsu Himitsu
ひとつふたつひみつ · ひとつ ふたつ ひみつ
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Following an "unfortunate" accident, Hanai Hikaru discovers the secret of Ishigami sensei ... or rather the secret of his nipples. Fortunately he is willing to help.
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections
Volumes
Canna Comics First edition
1vols · 2012-11
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